Malicious PDF — malware analysis report

Static analysis result for SHA-256 6df5f6d77db24b1f…

MALICIOUS

PDF

81.5 KB Created: 2021-03-04 22:36:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: eea707c8f573677cd08b24e23ec8ee9d SHA-1: 966e6ab07bbeca1ef0cc8cf479eb525133790799 SHA-256: 6df5f6d77db24b1f60b2b6fe89ee9583c2061075ee7519f04b663c69d21a4b71
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://golowaki.ru/award?keyword=is+easy+going+good+or+bad PDF link annotation
    • http://myfirstsite.xyz/404857310590yho4.pdfIn PDF document text
    • https://cdn.sqhk.co/xanuramalu/Shjjdgf/palowitexeriv.pdfIn PDF document text
    • http://dvertsoff.ru/nonuvekodimuvonaxuxitazojni4r3.pdfIn PDF document text
    • http://esclick.pro/xorovazanexeteggiom.pdfIn PDF document text
    • https://cdn.sqhk.co/definuseju/dMpjiic/2712725700.pdfIn PDF document text
    • https://cdn.sqhk.co/pemejurove/vgjULig/somewhere_the_vault_papers_full_game_apk.pdfIn PDF document text
    • http://easylearning.space/evidence_of_evolution_worksheet_keyn46hl.pdfIn PDF document text
    • http://epipog.com/52546038263br93d.pdfIn PDF document text
    • http://websecurer.tech/q_hacer_antes_durante_y_despues_de_un_terremotok8wyw.pdfIn PDF document text
    • http://helpcontactform.com/49699937501l3ezu.pdfIn PDF document text
    • http://bcpzonasegurape2-viabcp.com/how_to_master_fl_studio_12a3ppp.pdfIn PDF document text
    • http://alesyasemiletova.com/international_s1700_dump_truck_specsbkpgm.pdfIn PDF document text
    • https://cdn.sqhk.co/bivadudit/h7hczhc/money_maker_lyrics_becky_g_english.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/d2a46781-355d-4423-998e-8ac04c5cf68f/linevipekiviku.pdfIn PDF document text
    • https://02bc4616-4eae-4b38-b2c9-0e654f754ee0.filesusr.com/ugd/069df5_a529035d847e45208e8a9efb642066ed.pdf?index=trueIn PDF document text
    • https://d8d078ea-10ec-4787-8e21-ef6e32b87a24.filesusr.com/ugd/8f6098_20d5cd20c0f5431db3656d248dc480b8.pdf?index=trueIn PDF document text
    • https://14535e1a-360a-4d01-a655-fa33e115c80e.filesusr.com/ugd/b222ea_17bb1bae0df04223ad72457c57e1e39c.pdf?index=trueIn PDF document text
    • https://47e244ab-6b1f-4ae7-97e8-86de5b619f9f.filesusr.com/ugd/e1d12c_3dda19f8d54d403d864abf11d644b3eb.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4d13161-1c02-4671-83c0-b4c6c72a8755/53853533006.pdfIn PDF document text
    • https://b5f169ef-6bcf-4d19-a24b-32bdc9dd7a5f.filesusr.com/ugd/2e79a6_83bcb95e28fa46fbbc499c028f855edf.pdf?index=trueIn PDF document text
    • https://6a1e2a5f-c456-4288-b9d5-5378f87870fb.filesusr.com/ugd/076fac_474e3d8f75794c9c9f1dab4538383a74.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f551e44-a24a-41cb-801d-e29f1d3e7bfb/how_to_write_a_persuasive_conclusion_example.pdfIn PDF document text
    • https://01dc7cc6-b8ed-446e-8cc8-1ad78882ed38.filesusr.com/ugd/e23fbb_bb7ef69817b44688a77e2b7e5dc4ca0d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/04bb8b99-0a64-4983-9c96-07bd517d9e6b/element_19_inch_tv_review.pdfIn PDF document text
    • https://0eaabcdb-938a-45a6-85a3-1a7d796bbcdd.filesusr.com/ugd/8d6d25_58ecbfbb576f456eb544811b3230a56e.pdf?index=trueIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f740.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF740 4848 bytes
SHA-256: 8ae30f7b9d92ce5f777e45903a4a6b2fab7b0aec37496ad591b9c18bd8ab6118
font_01_sfnt_off000107b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107B6 10080 bytes
SHA-256: 5ffaff9cd53da95ba3c91d16bbc3cee1993990409f0e09d6322d713677bf182b
font_02_sfnt_off00012a4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A4B 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378